Monday, February 28, 2011

Fermi LAT weekly report N.142



Covered period: 2011.Feb.21 - 2011.Feb.27

LAT Mission week: 142.57 - 143.57





  • Mkn 421 detected on Feb. 24 and 27 with daily flux in the range 0.3-0.5 X 10-6.

  • PKS 0537-441 detected on Feb. 21 and 24 with daily flux in the range 0.8-1.1 X 10-6.

  • PKS 1622-253 detected on Feb. 25 and 27 with daily flux in the range 1.0-1.8 X 10-6.

  • S4 1749+70 detected in 4 days after Feb. 24 with daily flux in the range 0.5-1.3 X 10-6.

  • 4C 21.35 detected on Feb. 25 and 27 with daily flux in the range 0.7-1.0 X 10-6.

  • 3C 454.3 was moderately bright and constant all week, with daily flux between 3.1 and 4.0 X 10-6.

  • Sporadic activity (fluxes above 1.0 X 10-6) observed from 1510-089 (1.4 X 10-6 on Feb. 25), CRATES J0742+5444 (1.2 X 10-6 on Feb. 26, ATel#3196), B2 2308+34 (1.1 X 10-6 on Feb. 21).

  • Sporadic activity (fluxes below 1.0 X 10-6) observed from PKS 1124-186 (0.4 X 10-6 on Feb. 27), PKS 0716+714 (0.5 X 10-6 on Feb. 26), AP Lib (0.4 X 10-6 on Feb. 21, ATel#3187 on the 6-hr run flare), 3C 279 (0.8 X 10-6 on Feb. 26), B3 1708+433 (0.9 X 10-6 on Feb. 26)



Fluxes are in the unit of photons/cm2/s above 100 MeV. All errors are statistical only.



Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.


For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.




Wednesday, February 23, 2011

Fermi LAT weekly report N.141



Covered period: 2011.Feb.14 – 2011.Feb.20


LAT Mission week: 141.57 - 142.57




  • The BL Lac object CGRaBS 1 748+7005 (also known as S4 1749+70) was detected in flaring state on Feb. 15, with a daily flux of 0.7 × 10–6 (ATel #3171)
  • 3C 454.3 was detected all week long (daily flux between 2.4 and 4.0 × 10–6).


  • PKS 0521-36 was seen at flux = 1.1 × 10–6 on Feb. 16 and 18.


  • PKS 2155-304 was detected throughout the week and in high state with a peak occurring on Feb. 18 flux = 1.7 × 10–6


  • PKS 1622-253 was detected with flux = 0.9 × 10–6 on Feb. 19.


  • CGRaBS J1748+7005, GB6 J0742+5444, PKS 2326-502 were detected almost all week.


  • Sporadic activity observed from Mrk 421, 4C +38.41, B3 1708+433, PKS 0537–441. All fluxes below 1.0 × 10–6.



Fluxes are in the unit of photons cm–2s–1 above 100 MeV. All errors are statistical only.



Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.

- Please acknowledge the LAT team if you use information from this report.


For questions and comments please contact:

- S. Buson (sara.buson[at]pd.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.



Tuesday, February 22, 2011



Covered period: 2011.Feb.07 – 2011.Feb.14

LAT Mission week: 140.57 - 141.57





  • 3C 454.3 was detected all week long (daily flux between 2.1 and 3.4 × 10–6).

  • PKS 2326–502 was detected sporadically throughout the week with a peak flux occurring on Feb 7 (1.5 × 10–6).

  • B2 1520+31 faded out after last week performance, being detected only the first two days (0.7-0.8 × 10–6).

  • PKS 1622–253 was detectable the first three days of the week (daily flux of 1.5, 1.7 and 1.1 × 10–6 respectively).

  • HB89 2149–307 flared on Feb 9 at (1.1 ± 0.3) × 10–6.

  • PKS 0521–36 was detected on Feb 8-10 reaching a peak flux occurring on the 10 at (1.7 × 10–6).

  • J123939+044409 flared on Feb 10 at (1.0 ± 0.3) × 10–6.

  • BL Lac underwent a flare on Feb 11 at (1.0 ± 0.3) × 10–6.

  • CRATES J1239+0443 on flare on Feb 13 at (1.2 ± 0.3) × 10–6.

  • LS I+61 303 quite active all week, with a peak daily flux of (1.5 ± 0.3) × 10–6 on Feb 8 and 11.

  • Sporadic activity observed from B2 1520+31 (7-8 Feb), 4C +38.41 (Feb 8), 1633+382 (Feb 8), PKS 0537–441 (Feb 9, 11 and 13), PKS 0402–362 (Feb 10 and 12), PKS 2155–304 (Feb 10 and 13) and B3 1708+433 (11-12 Feb). All fluxes below 1.0 × 10–6.



Fluxes are in the unit of photons cm–2s–1 above 100 MeV. All errors are statistical only.



Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.

- Please acknowledge the LAT team if you use information from this report.



For questions and comments please contact:

- D. Bastieri (denis.bastieri[at]pd.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.




Thursday, February 10, 2011

Fermi LAT weekly report N. 139



Covered period: 2011.Jan.31 - 2011.Feb.06

LAT Mission week: 139.57 - 140.57





  • 3C 454.3 was detected all week long (daily flux between 2.8 and 4.1 X 10-6).

  • B2 1520+31 continues to be active (daily flux between 0.3 and 1.7 X 10-6).

  • PKS 2326-502 was detected sporadically throughout the week with a peak flux occurring on Feb. 6 (1.3 X 10-6).

  • PKS 1622-253 was seen on Feb. 3 and on Feb. 6 (daily flux of 1.9 and 1.6 X 10-6 respectively).

  • The region of Cygnus X-3 was intermittently active during the week with a peak flux seen on Feb. 4. This follows reports of increased gamma-ray activity from this object seen by AGILE (see A. Tels. 3151 and 3141)

  • 4C +21.35 was detected at a daily flux of 1.2 + 0.3 X 10-6 on Feb. 1

  • Sporadic activity observed from PKS 0402-502 (Jan. 31), PKS 0537-441 (Feb. 2 - 5), 4C +38.41 (Feb. 3), CRATES J0742+5444 (Feb. 5) and B2 2308+34 (Feb. 4 and 5). All fluxes below 1.0 X 10-6.



Fluxes are in the unit of photons/cm2/s above 100 MeV. All errors are statistical only.



Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.


For questions and comments please contact:

- J. S. Perkins (jeremy.s.perkins[at]nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.




Friday, February 4, 2011

Fermi LAT weekly report N. 138



Covered period: 2011.January.24 - 2011.January.30

LAT Mission week: 138.57 - 139.57




  • B21520+31 detected in high state for all the week reaching flux of (1.8+/-0.3)e-6 in the daily time scale on January 29.


  • PKS 0537-441 detected for all the week with daily flux between 0.1e-6 and 0.6e-6.


  • 3C 454.3 fairly bright for all the week, with daily flux between 2.5e-6 and 6.4e-6.

  • Sporadic daily detections of blazars: MKR421 (27, 24 Jan.), PKS0727-11 (27 Jan.), PKS2326-502 (27, 26, 24 Jan.),
    3C 66A (27 Jan.) CGRaBS J0211+105 (26, 28 Jan.) B2 0200+30 (25 Jan.), PKS B1222+216 (24 Jan.), PKS 1830-211 (24 Jan.),
    OC 457 (27 Jan.), CGRaBS J0509+0541 (27, 26 Jan.) and CRATES J0742+5444 (26 Jan)


Fluxes are in the unit of photons/cm^2/s above 100 MeV.


Note. All the flux reported above are by the ASP analysis and should
be considered preliminary and should not be used for publication,
however they are indicative of the flux range and the current status
of a source.
Source association is done on the basis of source location,
considering spatial coincidence only, and it is not indicative of an
identification.
- Please acknowledge the LAT team if you use information from this report.


For questions and comments please contact:

-S. Cutini (sara.cutini@asdc.asi.it) for generic information related to this week.

Contact persons on this page for individual sources cited above.